/*
 * Copyright 2011 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.google.code.qsecurity.client.activity;

import com.google.code.qsecurity.client.QClientFactory;
import com.google.code.qsecurity.client.event.OfflineEvent;
import com.google.code.qsecurity.client.event.StateChangeEvent;
import com.google.code.qsecurity.shared.QRequest;
import com.google.code.qsecurity.shared.proxy.UserProxy;
import com.google.gwt.activity.shared.AbstractActivity;
import com.google.gwt.event.shared.EventBus;
import com.google.gwt.user.client.ui.AcceptsOneWidget;

/**
 * Activities are started and stopped by an ActivityManager associated with a container Widget.
 */
public class OfflineActivity extends AbstractActivity {
	/**
	 * Used to obtain views, eventBus, placeController.
	 * Alternatively, could be injected via GIN.
	 */
	private QClientFactory clientFactory;
	private StateChangeEvent event;

	public OfflineActivity(OfflineEvent event, QClientFactory clientFactory) {
		this.clientFactory = clientFactory;
		this.event = event;
	}

	@Override
	public void start(AcceptsOneWidget containerWidget, EventBus eventBus) {
		UserProxy user = event.getUser();
		
		// logout
		if (user != null) {
			QRequest request = clientFactory.getRequestFactory().qRequest();
			request.logout(user.getEmail()).fire();
		}
	}

	@Override
	public String mayStop() {
		return null;
	}

}
